It's a cute little puzzle book and I absolutely love it. I finished the puzzles in a few days, there are reference pictures so you don't mess up and it's also perfect to learn some Japanese vocabulary related to Gudetama (mostly about food and sleep). I would definitely recommend it for people who want a cute way to relax, Gudetama collectors and children (although younger ones might have a bit of trouble with the last few puzzles, the pieces are quite tiny and require some precision!).